Wahidiyat, P.A., Department of Child Health, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia, Department of Hematology and Oncology, Rumah Sakit Umum Pusat Nasional Dr Cipto Mangunkusumo, Central Jakarta, Indonesia; Yo, E.C., Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia; Wildani, M.M., Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia; Triatmono, V.R., Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia; Yosia, M., Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia